1. Identifying rule of weld drawing Teknologi Las kapal

2. Teknologi dan Rekayasa Difinition of weld drawing A welding drawing is a detailed multiview drawing showing all the parts welded together. The graphic representation of welded parts is shown by welding symbols. The weldment is not shown, but the joint lines are shown. The welding symbols give all the information necessary for the welder to fasten the parts together using one the welding techniques.

3. Teknologi dan Rekayasa Welded joints Butt Tee / Fillet LapCorner Edge

4. Teknologi dan Rekayasa FLAT HORIZONTAL VERTICAL OVERHEAD Welding positions

5. Teknologi dan Rekayasa Welding symbols Welding symbols give the welder specific instructions about the weld including: Placement Size Length Process Any other special notes

6. Teknologi dan Rekayasa Welding symbols Each type of weld is characterized by a basic symbol derived from its section shape. Supplementary symbols are usually used to specify the contour of the weld, whether the welding is performed in the field or in the shop, or if it is applied all around the welded part.

7. Teknologi dan Rekayasa Weld symbols on the drawing

8. Teknologi dan Rekayasa Weld symbol consists of eight parts Reference line Leader line Basic weld symbol (location/depth of weld) Finish symbol Weld symbol (type of weld) Dimensions Supplementary symbols Tail and specification

9. Teknologi dan Rekayasa Rules tobe observed 1.Symbols for fillet and similar welds be shown such that the vertical position of the symbol are indicated on the left hand side of the symbol,irrespective of the orientation of the weld metal. 2.If the welds are to be made on the arrow side of the joint,the corresponding symbol should be placed either above or below the continuous reference line (Fig.) 3.If the welds are to be made on the other side of a joint,the corresponding symbol should be placed above or below the dashed reference line. 4.If the welds are to be made on both sides of the a joint, the corresponding symbols should be placed on both sides of the reference line and the dashed line is not shown. 5.The arrow of the symbol must point towards the joint which required welding.

10. Teknologi dan Rekayasa Rules tobe observed 6.When only one member is to be edge prepared to make the joint, the arrow should point at the plate. 7.Dimensions of size are indicated in mm without writing the unit mm. 8.If unequal legs of fillet are to be used,they should also be given on the left hand side. 9.If a welding is required to be made on the site or during erection or assembly, it is re 10.If a weld is to be made all around a joint, a circle should also be placed at the elbow,connecting the arrow and the reference line. 11.If a weld is to have a flush or flat finish, a straight line should be added above the symbol. 12.The welding process is indicated, if required,at the end of the arrow.

11. Teknologi dan Rekayasa Example

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16. Enjoy the lesson !